JP2008062175A - Air purification apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air purification apparatus which improves an amenity and convenience by distinguishing the position of a user in a room to carry out efficiently the operation to an air pollution. <P>SOLUTION: A direction distinguishing part 6 distinguishing the direction in which the user is present, provided in a body 1, and a mobile blowout part 5 supplying purified air distinguish the direction in which the user is present, and by fixing the mobile blowout part 5 to the direction, the air purification apparatus which can send always the blowout wind purified to the user is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air purifier that detects indoor air contamination with a dust sensor and a gas sensor, and that a controller drives a blowing means to suck in indoor air and cleans it through a cleaning means.

  Conventionally, this type of air purifier is known as described below.

  Hereinafter, the air cleaner will be described with reference to FIGS. 10 and 11. As shown in the figure, the air purifier main body 101 is provided with a front panel 102, a filter 103 for cleaning air, a fan motor 104 for sucking air, and a wind direction louver that blows out purified air. 105 and a control unit 106 for controlling the wind direction louver 105. In addition, an air pollution sensor 107 that detects indoor air pollution is provided on the front surface of the main body 101.

In the above configuration, the control unit 106 sequentially stores the dirt level detected by the air dirt sensor 107 while sequentially changing the blowing direction of the wind direction louver 105, and the blowing direction of the wind direction louver is at the position of the wind direction louver 105 having the highest dirt level. Is fixed, and a cleaning operation corresponding to dirt in the room is performed (see, for example, Patent Document 1).
JP 2006-057919 A

  In such a conventional air cleaner, since the blowing direction of the blowing air is fixed regardless of the position of the user, the cleaned air does not reach the user and the user's surroundings are cleaned. There is a problem that it takes time, and it is required to determine the position of the user and blow clean air.

  In addition, since the blowing direction of the blowing air is fixed regardless of the position of the user, there is a problem that the wind hits the user and the user is cold. It is required to remove dirt.

  In addition, even if there is no person, the blowing direction is fixed, so there is a problem that the wind circulation efficiency is poor and the dirt removal efficiency is lowered, and when there is no person, the blowing direction is swung left and right to improve the removal efficiency. It is required to be raised.

  In addition, depending on the user, there is a problem that it is not possible to select whether or not the blowing direction is set to the user's own direction, and the user-friendliness is bad.

  Also, when the room temperature is low, such as in winter, there is a problem that it is cold when the wind hits it directly. When the room temperature is low, the blowing direction is changed so that the wind does not hit directly, or the wind is relaxed and softened. Is required.

  In addition, when the blowing direction is fixed in the direction in which the user is present, there is a problem that if the indoor dirt level is high, the wind is annoying when the maximum air volume is used, and dirt is removed by driving with less annoyance. Is required.

  Also, when the blowing direction is fixed in a direction where there is no user, there is a problem that it takes time to remove the dirt by operating at the minimum air volume if the dirt level in the room is low. Is required.

  Further, when the indoor dirt is dusty dirt, it tends to settle and drifts to a relatively low position, so there is a problem that it cannot be removed efficiently, and it is required to efficiently remove it by changing the blowing direction.

  In addition, when the indoor dirt is odorous dirt, it tends to rise and drifts to a relatively high position, so that there is a problem that it cannot be removed efficiently, and it is required to efficiently remove it by changing the blowing direction.

  The present invention solves such a conventional problem, and operates by changing the blowing direction by determining the position of the user, and by changing the blowing direction depending on the room temperature. Also, depending on the direction of air flow, the operation air volume is changed depending on the level of dirt in the room, and the operation is performed according to the type of dirt material generated, and the user does not feel bothered. It aims at providing the air cleaner which becomes the operation mode which removes.

  In order to achieve the above object, the air cleaner of the present invention has an intake port provided in a main body, a cleaning unit that cleans dirty air sucked from the intake port, and a blowing unit that ventilates the cleaning unit. A blowing means capable of changing a blowing direction for blowing clean air from the blowing means into the room, a dirt detecting means for detecting dirt in the air, and a direction judging means for judging the direction of the person in the room A control unit that determines the air volume of the air blowing unit from the signal from the dirt detection unit and controls the operation, and the control unit determines the blowing direction of the blowing unit according to the position of the person detected from the direction determining unit. It is intended to be fixed in the direction of the.

  By blowing air that has been cleaned in the direction in which the user is present by this means, an air cleaner that allows the user to always live in a highly clean space can be obtained.

  In order to achieve the above object, the air cleaner of the present invention has an air inlet provided in a main body, a cleaning means for cleaning dirty air sucked from the air inlet, and an air blown through the cleaning means. Means, a blowing means capable of changing the blowing direction for blowing clean air from the blowing means into the room, a dirt detecting means for detecting dirt in the air, and a direction discrimination for judging the direction of the person in the room And a control unit that determines and controls the air flow of the blowing unit from a signal from the dirt detection unit, and the control unit determines the blowing direction of the blowing unit according to the position of the person detected from the direction determining unit. It is intended to be fixed in a direction where no people are present.

  By this means, since the user does not directly receive the blown air, an air cleaner that can be operated without feeling inconvenience is obtained.

  In order to achieve the above object, the air cleaner of the present invention has an air inlet provided in a main body, a cleaning means for cleaning dirty air sucked from the air inlet, and an air blown through the cleaning means. Means, a blowing means capable of changing the blowing direction for blowing clean air from the blowing means into the room, a dirt detecting means for detecting dirt in the air, and a direction discrimination for judging the direction of the person in the room And a controller for controlling the operation by determining the air volume of the air blowing means from the signal from the dirt detecting means, and the control part determines the air blowing direction of the air blowing means when no person is detected from the direction determining means. It is designed to be movable.

  By this means, when there is no user, an air cleaner capable of efficiently removing air dirt by blowing air over the entire room can be obtained.

  In order to achieve the above object, the air purifier of the present invention blows air in the direction in which the person is present or in the direction in which no person is present with respect to the position of the person detected by the direction discriminating means. It has an operation switch that can be selected.

  By this means, the user can select the air blowing direction, so that an air cleaner with improved user convenience can be obtained.

  In order to achieve the above object, the air cleaner of the present invention has an air inlet provided in a main body, a cleaning means for cleaning dirty air sucked from the air inlet, and an air blown through the cleaning means. Means, a blowing means capable of changing the blowing direction for blowing clean air from the blowing means into the room, a dirt detecting means for detecting dirt in the air, and a direction discrimination for judging the direction of the person in the room Means, a temperature detection means for detecting the temperature in the room, and a control section for determining the air volume of the blower means from the signal from the dirt detection means and controlling the operation, and the control section receives a signal from the temperature detection means. When it is lower than the prescribed level, the blowing direction is moved to the left and right, and when it is higher than the prescribed value level, the blowing direction of the blowing means is fixed to the direction in which a person is detected from the direction discriminating means. .

  If the temperature in the room is low even if blowing air is blown to the user by this means, air that has improved usability by eliminating the troublesomeness by changing the blowing direction so that the wind does not directly hit the user A cleaner is obtained.

  In the air cleaner of the present invention, in order to achieve the above object, the control unit lowers the air volume of the air blowing means determined from the signal from the dirt detecting means by one step.

  Even if blowing air is blown to the user by this means, if the indoor dirt level becomes high, the operating air volume does not increase, so it is possible to reduce the annoyance by reducing the direct blow of strong wind to the user. An air purifier with improved performance can be obtained.

  In the air cleaner of the present invention, in order to achieve the above object, the control unit increases the air volume of the air blowing means determined from the signal from the dirt detecting means by one step.

  By this means, since the blowing air is blown in the direction where there is no user, even if the indoor dirt level is low, an air cleaner can be obtained that can remove air dirt in a short time by increasing the operating air volume.

  In order to achieve the above object, the air purifier according to the present invention is configured such that the control unit is configured to dispose the blowing unit of the blowing unit when the air volume of the blowing unit determined from the signal from the dirt detecting unit is the maximum air volume. Swing up and down.

  Even if blowing air is blown to the user by this means, if the indoor dirt level becomes high, the air blowing direction swings up and down to soften the wind perception, reducing the direct blow of strong wind to the user and bothering. An air purifier that eliminates this problem and improves usability can be obtained.

  In order to achieve the above object, the air purifier of the present invention fixes the blowing direction of the blowing means to the front side according to the dirt level when the signal from the dirt detecting means is dust dirt. It is what I did.

  By this means, a circulating airflow to the front side is generated, so that an air cleaner capable of efficiently removing dust dirt that tends to settle is obtained.

  In order to achieve the above object, the air cleaner of the present invention fixes the blowing direction of the blowing means to the top surface side according to the dirt level when the signal from the dirt detecting means is odor dirt. It is what you do.

  By this means, a circulating airflow is generated on the top surface side, so that an air cleaner capable of efficiently removing odor stains floating in the entire room can be obtained.

  In order to achieve the above object, the air purifier of the present invention is configured such that the control unit is fixed in a direction in which a person is detected from the direction determination unit when the signal of the temperature detection unit is lower than a specified level. The blowing direction of the blowing means is swung back and forth.

  Even if blowing air is blown to the user by this means, when the temperature in the room becomes low, the blowing direction swings back and forth to soften the wind perception, so it is less troublesome to hit the user directly. An air purifier that eliminates this problem and improves usability can be obtained.

  In order to achieve the above object, the air cleaner of the present invention fixes the direction determining means to a direction in which no person is present during the air volume operation of the air blowing means determined from the signal from the dirt detecting means. The blow-out direction of the blow-out means is made to swing back and forth.

  This means that the blowing air is blown in the direction where no user is present, so even if the indoor dirt level is low, the air blowing can swing back and forth to increase the air dirt circulation efficiency and remove it in a short time. A machine is obtained.

  According to the first aspect of the present invention, there is provided an air inlet provided in a main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and the air blowing means. A blowing means capable of changing the blowing direction for blowing clean air from the room into the room, a dirt detecting means for detecting dirt in the air, a direction judging means for judging the direction of a person in the room, and the dirt detection A control unit that determines the air volume of the blowing unit from a signal from the unit and controls the operation, and the control unit sets the blowing direction of the blowing unit in the direction in which the person is present according to the position of the person detected from the direction determining unit. It is fixed, and when the indoor air is cleaned, the cleaned air is sent in the direction of the user, so that the user can always stay in the cleaned space.

  In addition, an air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and clean air from the air blowing means are blown into the room. A blowing means capable of changing the blowing direction, a dirt detecting means for detecting dirt in the air, a direction judging means for judging the direction in which the person is in the room, and a signal from the dirt detecting means A control unit that determines the air volume and controls the operation, and the control unit fixes the blowing direction of the blowing unit in a direction in which no person is present according to the position of the person detected from the direction determination unit; Since the blown air blown out is emitted in the direction in which the user is not present, it has an effect of removing air dirt without making the user feel bothered by the direct wind.

  In addition, an air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and clean air from the air blowing means are blown into the room. A blowing means capable of changing the blowing direction, a dirt detecting means for detecting dirt in the air, a direction judging means for judging the direction in which the person is in the room, and a signal from the dirt detecting means It has a control unit that determines the air volume and controls the operation, and the control unit is configured to move the blowing direction of the blowing means left and right when no person is detected from the direction determining means, and there is no user. In this case, since the swinging direction is left and right without fixing the blowing direction, the airflow can be efficiently removed by flowing a circulating airflow throughout the room.

  Further, with respect to the position of the person detected by the direction discriminating means, there is an operation switch that can select whether to blow in the direction in which the person is present or in the direction in which no person is present. It has the effect that the blowing direction can be selected depending on the situation.

  In addition, an air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and clean air from the air blowing means are blown into the room. A blowing means capable of changing the blowing direction, a dirt detecting means for detecting dirt in the air, a direction discriminating means for discriminating the direction in which the person is in the room, a temperature detecting means for detecting the temperature in the room, A controller that determines the air volume of the blower from the signal from the dirt detector and controls the operation, and when the signal from the temperature detector is lower than a specified level, the controller moves the blowing direction to the left or right; When the temperature is higher than a specified value level, the direction of the blowing means is fixed to the direction in which the person is detected from the direction discriminating means, and the direction where there is no user when the room temperature is low as in winter. Blown blowing wind, has the effect of air contamination can be removed without feel troublesome to a user since the blowing wind blowing in the direction in which the user is when a high ambient temperature as in summer.

  Further, the air volume of the air blowing means determined from the signal from the dirt detecting means is decreased by one step, and the air is blown in the direction in which the user is present even when the indoor dirt level is high. Since the air volume does not increase, the air dirt can be removed without making the user feel bothersome.

  Further, the air volume of the air blowing means determined from the signal from the dirt detecting means is increased by one step, and even when the indoor dirt level is low when blowing the blown air in the direction where the user is not present. Since the operating air volume is increased, the air dirt removal speed can be increased without making the user feel bothersome.

  Further, when the air volume of the air blowing means determined from the signal from the dirt detecting means is the maximum air volume, the air blowing portion of the air blowing means is swung back and forth, and the air blowing air is blown in the direction in which the user is present. Since the blowing part is swung back and forth when the air is blown, it has the effect that the air volume can be removed without reducing the air volume hitting the user and making it bothersome.

  In addition, when the signal from the dirt detection means is dust dirt, the blowing direction of the blowing means is fixed to the front side according to the dirt level, and the indoor low range where relatively heavy dust dirt floats By generating a circulating airflow in the space, it has an effect that dust dirt can be efficiently removed.

  In addition, when the signal from the dirt detection means is odor stain, the blowing direction of the blowing means is fixed to the top surface side according to the dirt level, and a high level in a room where relatively light odor dirt floats. By generating a circulating airflow in the area space, dust dirt can be efficiently removed.

  In addition, when the signal of the temperature detecting means is lower than the specified level, the blowing direction of the blowing means fixed in the direction in which the person is detected from the direction determining means is swung back and forth. When blowing the blowing air in the direction where the air is, the air blowing part is swung even if the room temperature is low, so the air hitting the user can be reduced and air dirt can be removed without feeling bothered. .

  Further, during the air volume operation of the air blowing means determined from the signal from the dirt detecting means, the air blowing direction of the air blowing means fixed in a direction in which no person is present from the direction determining means is swung back and forth. Even if the dirt level in the room is low, the air blowing direction swings back and forth, thereby improving the air dirt circulation efficiency and removing it in a short time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 5, the main body 1 of the air cleaner is formed in a substantially box shape, a front panel is provided on the front surface of the main body 1, and an air inlet 2 is formed on the side surface of the main body 1. A filter 3 for purifying air and a fan motor 4 for passing air through the filter 3 are provided in the main body 1, and a movable blowout portion 5 is provided on the top surface of the main body 1. When the fan motor 4 is driven, air is sucked from the air inlet 2, cleaned through the filter 3, and then blown from the movable blowout part 5. As the movable blowout part 5, it is only necessary that the blowout port or the blowout direction can be moved, and for example, there is a louver in conjunction with a stepping motor.

  A direction discriminating unit 6 provided with infrared sensors 6a, 6b and 6c is provided at the upper front of the main body 1 as means for discriminating the position of a person, and a gas detecting unit 7 provided with a gas sensor 7a as dirt detecting means at the upper part of the main body 1. And a dust detection unit 8 having an optical dust sensor 8a as a dirt detection means.

  An operation unit 9 is provided at the upper front of the main body 1, and a calculation unit 12 is provided in the control unit 10. The main body 1 is provided with a dirt display unit 11 at the front left end of the main body 1 to indicate the dirty state of room air by color change.

  In the above configuration, when the power source is energized, the control unit 10 performs a process of converting the output signal detected by the gas detection unit 7 or the dust detection unit 8 into a dirt level value of 0 to 5, and the operation unit 9 is automatically operated. When set, the control unit 10 operates the fan motor 4 according to the dirt level value. At this time, the air flow rate of the fan motor 4 with respect to the dirt level detected by the gas detection unit 7 or the dust detection unit 8 has the relationship shown in FIG.

  Further, as shown in FIG. 4, the direction discriminating unit 6 separates the infrared sensors 6a, 6b, and 6c into “left”, “center”, and “right” corresponding to the three stages, and detects the respective infrared amounts. The signal is transmitted to the control unit 10. The control unit 10 calculates the signal by the calculation unit 12, and if the position where the amount of infrared detection is large is the infrared sensor 6c, the control unit 10 determines that the person is present on the right side and moves the movable blowing unit 5 in the right direction. Turn.

  As described above, since the cleaned blowing air is sent to the position where the user is in the room, the user can always live in a clean environment.

  Further, here, the blowing air is blown to a position where a person is present, but the blowing air may be blown in the direction in which the detected amount of infrared rays is the smallest so as to eliminate the annoyance caused by the wind.

  Further, here, the amount of infrared rays detected is compared to determine the blowing direction. However, when infrared rays are not detected, the blowing portion may be repeatedly blown from the left to the center and then to the right to blow the entire room.

  In addition, although the direction of blowing is determined here based on the detected amount of infrared rays, a setting switch may be provided to set a mode in which the user blows.

(Embodiment 2)
Since the present embodiment is provided with a temperature detection unit 13 for detecting the temperature in the room as compared with the first embodiment, the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIGS. 6 and 7, when the temperature detected by the temperature detector 13 exceeds the specified value of 20 ° C. with respect to the position of the person detected by the direction discriminator 6, When the detected temperature is less than 20 ° C., the position of the movable blowing unit 5 is not fixed and the “left”, “center”, “ Move it to the “right” continuously to perform clean operation. The temperature detector 13 only needs to be able to detect the temperature, and includes, for example, a temperature sensor such as a thermistor.

  As described above, when the room temperature is lowered, the air blowing direction is moved, so that a clean operation can be performed without causing the user to feel the cool feeling caused by the air blowing.

  Moreover, although the blowing part was moved right and left here, there is no difference in the effect even if it swings back and forth.

(Embodiment 3)
The present embodiment is different from the first or second embodiment only in the control method, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIGS. 8 (a) and 8 (b), when the blowing unit 5 is fixed at a position where a person is present, the blower amount of the fan motor 4 with respect to the dirt level detected by the gas detecting unit 7 or the dust detecting unit 8 is 1. Since the air flow rate is set to a step-down level, when air pollution of normal level 5 is detected, the air volume is rapidly operated, but the air volume is decreased by one level. Further, when the movable blowout unit 5 is fixed at a position where no one is present, the blowing amount of the fan motor 4 with respect to the dirt level detected by the gas detection unit 7 or the dust detection unit 8 is set to the blowing amount increased by one step. For this reason, when air pollution of normal dirt level 1 is detected, the engine is operated with a low air volume, but is operated with the air volume increased by one step.

  In this way, when the blowing air is blown to the position where the user is present, even if the indoor dirt level is high, it can be cleaned and operated without feeling annoying to the user without increasing the air volume. In the case where the blowing air is blown to a position where there is no person, even if the indoor dirt level is low, the air volume can be increased and removed in a short time.

  Also, here, when the blowing air is blown to the position where the user is present, the air volume is not increased even if the indoor dirt level is high, but the air flow is still increased and the blowing portion is swung back and forth. There is no difference in the effects.

  Also, here, when the blowing air is blown to a position where there is no user, the air volume is increased even if the dirt level in the room is low, but the air blowing part is swung back and forth with the air volume lowered. There is no difference in the effects.

(Embodiment 4)
The present embodiment is different from the first or second embodiment only in the control method, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 9, when the detected air dirt substance is dirt by the dust detection unit 8, the blowing part 5 is fixed to the front side, and when it is dirt by the gas detection part 7, the blowing part 5 is fixed to the top surface. Clean operation by fixing to the side.

  In this way, air pollution can be efficiently removed by changing whether the blown air current circulates in the low-frequency space or the high-frequency space depending on the space in which the detection substance floats.

  Since the convenience of the air cleaner can be improved by specifying the position of the user in the room, it can also be applied to the operation control of the humidifier.

1 is a perspective view of a partially broken external view of an air cleaner according to a first embodiment of the present invention. Correlation diagram of operating air volume against dirt level value of each detector Same control block diagram Schematic diagram of the infrared sensor unit ((A) A schematic diagram of the same direction discriminating unit, (B) A diagram showing the amount of infrared rays from the infrared sensor when the blowout unit is set to the right) Same control flowchart Block diagram of Embodiment 2 of the present invention Same control flowchart Correlation diagram of operating air volume with respect to the dirt level value of each detection part of Embodiment 3 of the present invention ((b) The dirt level value of the gas detection part and the dust detection part when the blowout part is fixed in the direction where the person is present The figure which shows the driving | running air volume with respect to (b) The figure which shows the driving | running air volume with respect to the dirt level value of a gas detection part and a dust detection part when the blowing part is fixed in the direction where a person does not exist) Control flowchart of Embodiment 4 of the present invention External perspective view of a conventional air purifier Control flow chart of the air cleaner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Intake port 3 Filter 4 Fan motor 5 Movable blowing part 6 Direction discrimination part 7 Gas detection part 8 Dust detection part (dirt detection means)
10 Control unit

Claims (12)

An air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and for blowing out clean air from the air blowing means into the room The blowing means capable of changing the blowing direction, the dirt detecting means for detecting dirt in the air, the direction judging means for judging the direction in which the person is in the room, and the air volume of the blowing means from the signal from the dirt detecting means An air cleaner having a control unit for determining and controlling the operation, wherein the control unit fixes the blowing direction of the blowing unit in a direction in which the person is present according to the position of the person detected from the direction determining unit. An air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and for blowing out clean air from the air blowing means into the room The blowing means capable of changing the blowing direction, the dirt detecting means for detecting dirt in the air, the direction judging means for judging the direction in which the person is in the room, and the air volume of the blowing means from the signal from the dirt detecting means An air cleaner having a control unit for determining and controlling the operation, wherein the control unit fixes the blowing direction of the blowing means in a direction in which no person is present according to the position of the person detected from the direction determining means. An air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and for blowing out clean air from the air blowing means into the room The blowing means capable of changing the blowing direction, the dirt detecting means for detecting dirt in the air, the direction judging means for judging the direction in which the person is in the room, and the air volume of the blowing means from the signal from the dirt detecting means An air cleaner having a control unit for determining and controlling the operation, wherein the control unit is configured to move the blowing direction of the blowing means to the left and right when no person is detected from the direction determining means. The control unit has an operation switch having an operation switch capable of selecting whether to blow in a direction where a person is present or in a direction where no person is present with respect to the position of the person detected by the direction determination means. An air inlet provided in the main body, a cleaning means for cleaning dirty air sucked from the air inlet, an air blowing means for ventilating the cleaning means, and for blowing out clean air from the air blowing means into the room A blowing means capable of changing the blowing direction, a dirt detecting means for detecting dirt in the air, a direction judging means for judging the direction in which the person is in the room, a temperature detecting means for detecting the temperature in the room, and the dirt detection A control unit that determines the air volume of the blowing unit from a signal from the unit and controls the operation, and when the signal from the temperature detection unit is lower than a specified level, the control unit moves the blowing direction left and right to a specified value An air cleaner that fixes the blowing direction of the blowing means in a direction in which a person is detected from the direction determining means when the level is higher than the level. 2. The air cleaner according to claim 1, wherein the control unit lowers the air volume of the air blowing means determined from a signal from the dirt detecting means by one step. 3. The air purifier according to claim 2, wherein the control unit increases the air volume of the air blowing means determined by a signal from the dirt detecting means by one step. 2. The air purifier according to claim 1, wherein the control unit swings the blowing unit of the blowing unit back and forth when the air volume of the blowing unit determined from the signal from the dirt detecting unit is a maximum air volume. . 3. The air cleaner according to claim 1, wherein when the signal from the dirt detecting means is dust dirt, the control unit fixes the blowing direction of the blowing means to the front side according to the dirt level. 3. The air cleaner according to claim 1, wherein when the signal from the dirt detection means is odor dirt, the control unit fixes the blowing direction of the blowing means to the top surface side according to the dirt level. The control unit swings back and forth in a blowing direction of the blowing means fixed in a direction in which a person is detected from the direction determining means when the signal of the temperature detecting means is lower than a specified level. Air purifier. The controller swings forward and backward in the blowing direction of the blowing means fixed in a direction in which no person is present from the direction determining means during the air volume operation of the blowing means determined from the signal from the dirt detecting means. Item 2. An air purifier according to Item 2.

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